Progress on high performance multijunction amorphous hydrogenated silicon alloy based solar cells and modules

Abstract

Multijunction solar cell modules based on a-Si:H and its alloys have been developed. Triple junction devices have been modeled to quantify parasitic optical losses. A laser patterning method for modules has been developed and 98% active/aperture areas demonstrated. An ad hoc module of light-induced stability is developed which suggests much improved stability is to be expected in the triple junction devices; this is verified by experimental data. Triple junction 939.6 cm² a-Si:H/a-Si:H/a-SiGe:H modules tested at SERI have demonstrated an aperture area efficiency of 9.27%.